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The study is conducted to examine the climate change impact on rice Crop Water Requirement (CWR) and Net Irrigation Requirement (NIR) using the NASA Earth Exchange Global Daily Downscaled Projection (NEX-GDDP) coupled with the CROPWAT 8.0 model. The maximum temperature (Tmax), minimum temperature (Tmin), and rainfall projections for the baseline (years 1981–2015) and future (years 2030 and 2040) under Representative Concentration Pathway (RCP) 4.5 were derived from NEX-GDDP. To reduce the bias, linear scaling (LS) and the modified difference approach (MDA) were employed. Results show that LS performed better than the MDA along with improved statistical measures such as mean (μ), standard deviation (σ), and percent bias (Pbias), in the case of Tmax and Tmin (μ = 31.14 and 19.63 °C, σ = 5.75 and 6.78 °C, Pbias = 1.43 and 0.33%), followed by rainfall (μ = 2.67 mm, σ = 4.94 mm, and Pbias = 2.4%). The future climatic projections showed an increasing trend in both Tmax and Tmin, which are expected to increase by 1.7 °C by 2040. This would cause an increased range of 1.2 and 2% in 2030 and 2040, respectively. Due to a wide variation in effective rainfall (Peff), NIR could increase by 4 and 9% in 2030 and 2040, respectively. The above results may help formulate adaptation measures to alleviate the impacts of climate change on rice production.

: Groundnut is the major oil seed crop in India and it plays a major role in bridging the vegetable oil deficit in the country and also serves as a protein supplement to animals in term of feed. Lower penetration of groundnut pegs and weeds grown with the crop are the responsible for drastic reduction of yield. Earthing up destroys weeds and increases pod development by increasing penetration of pegs in the soil. But traditional methods of earthing up are tedious, laborious, and time consuming which leads to high cost of production. Pertaining to this, a simple mechanical earthing up equipment was developed and evaluated under groundnut crop at two operating conditions i.e., 2 and 4 rows at a time. The results obtained at 2 rows and 4 rows earthing up condition were the earthing up efficiency (96 and 93 %), plant damage (1.96 and 3.5 %), effective field capacity (0.096 and 0.126 ha/h), field efficiency (80 and 52.5 %), fuel consumption (4.72 and 3.96 L/ha) and cost of earthing up (628.67 and 500 Rs./ha), respectively.